Question

Sendo f(x) = 8x - 5, calcule f(-3).
(a). 2
(b). -29
(c). 19
(d). -19
(e). 15

Answer 1

Letra B -29

$f(x) = 8x - 5 \: \: \: \: \: \: \: \: \: \: f( - 3) \: \: \: \: \: \: \: \: \: x = - 3 \\ f( - 3) = 8 \times ( - 3) - 5 \\ f( - 3) = - 24 - 5 \\ \color{green} f( - 3) = - 29$

$\mathcal{Bons \: estudos }$

$\displaystyle\int_ \empty ^ \mathbb{C}     \frac{ - b \: ± \:  \sqrt{ {b}^{2} - 4 \times a \times c } }{2 \times a} d{ t } \boxed{ \boxed{ \mathbb{\displaystyle\Re}\sf{ \gamma  \alpha }\tt{ \pi}\bf{ \nabla}}}$